package cn.itcast.usermanage.view;

import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import cn.itcast.usermanage.bean.Constants;
import cn.itcast.usermanage.pojo.User;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.joda.time.DateTime;
import org.springframework.web.servlet.view.document.AbstractExcelView;


public class UserExcelView extends AbstractExcelView {

    @Override
    protected void buildExcelDocument(Map<String, Object> model, HSSFWorkbook workbook, HttpServletRequest request, HttpServletResponse response) throws Exception {
        // 从model对象中获取userList
        @SuppressWarnings("unchecked")
        List<User> userList = (List<User>) model.get("userList");
        // 创建Excel的sheet
        HSSFSheet sheet = workbook.createSheet("会员列表");

        // 创建标题行
        HSSFRow header = sheet.createRow(0);
        header.createCell(0).setCellValue("ID");
        header.createCell(1).setCellValue("用户名");
        header.createCell(2).setCellValue("姓名");
        header.createCell(3).setCellValue("年龄");
        header.createCell(4).setCellValue("性别");
        header.createCell(5).setCellValue("出生日期");
        header.createCell(6).setCellValue("创建时间");
        header.createCell(7).setCellValue("更新时间");

        // 填充数据
        int rowNum = 1;
        for (User user : userList) {
            HSSFRow row = sheet.createRow(rowNum);
            row.createCell(0).setCellValue(user.getId()==null?null:user.getId());
            row.createCell(1).setCellValue(user.getUserName()==null?"":user.getUserName());
            row.createCell(2).setCellValue(user.getName()==null?"":user.getName());
            row.createCell(3).setCellValue(user.getAge()==null?null:user.getAge());
            row.createCell(4).setCellValue(sexStr(user.getSex()==null?null:user.getSex()));
            row.createCell(5).setCellValue(new DateTime(user.getBirthday()).toString(Constants.DATE));
            row.createCell(6).setCellValue(new DateTime(user.getCreated()).toString(Constants.DATE_TIME));
            row.createCell(7).setCellValue(new DateTime(user.getUpdated()).toString(Constants.DATE_TIME));

            rowNum++;
        }
        // 设置相应头信息，以附件形式下载并且指定文件名
        response.setHeader("Content-Disposition", "attachment;filename=" + new String("会员列表.xsl".getBytes(),"ISO-8859-1"));
    }

    public String sexStr(Integer sex){
        String sexStr;
        if (sex == 1) {
            sexStr = "男";
        } else if (sex == 2) {
            sexStr = "女";
        } else {
            sexStr = "未知";
        }
        return  sexStr;
    }
}
